Lamp.



W. S. HAMM.

LAMP.

AIPLIOATION FILED `JUNE 2B, 19'12 Patented Nov. l, 1913.

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Specification of Lcttcra ta'tcnt.

.application tiled June 2G` 191:2. Serial NoA 705.9%.

To all whom 'it muy concern t Bo it; known that l", VVHJMM S. linnn', acitizen of the United Staten, and resident oli Hubbard lvoods, countyot' tloolc, and 5i-tato ot Illinois, have invented certain new anduseful improvements in Linups, ot' which the following is aspecitication, and which are illustrated in thc accompanying.; drawings,forming;` a part thereof. l

The .invention rolaten to lamps especially adapted :toi: switch andsignal service m railroad work: and its object is `to provide i1npro\'edmeans for setaircly holding the font within the lamp So as to preventthe illuminating agent 'troni being' moved hy jara` or vibration,incident to scrviec, away troni the axis ot' the lamp.

ltt consists essentially in a dotent carried either by the font or itstout and yieldingrly engaging a vcrtically tfaeina Shoulder on the otherof said members.

In the accompanying; drawings; ilhutrat iup; the invention,Figure It adetail vcr- 'tical section of the lamp across the tout. taken on theline l-1 ot ltiig. 2; tlig. i?, in a pla Section, on the lino 2?? ofFig". t; and Figo. 3 and 4t arc, resi'iectircly, `vertical and plandetail Sections oit the lamp casing and font showing a modified t'orm otconstruction.

The lamp body is represented at llt), and is shown as being;- providedwith a pair ot' lenses 1l, 1.2i in its sido walls. rl`ho hotly isprovided with a Substantially `[lat hottoni t3, upon which the font latrests, and with up- Standing walls l5, 16, riningr 'from the hott-oni 13and at their upper cnds being inclined outwardly and upwardly, as shownat t7, lil, these inclined portions extending to the side. walls of thebody.

In the construction illustrated in Fin l. and 2, there, ia shown a pairotE lea't" springs 1t), 20,-housed within the spaces inclosed hctweenthc walls 15, 1G, and the outer walls of the lamp hody, cach spring,vbeing securely anchored at ono end, as shown, hy means ot` rivetsscouring' it to thc walls oi the hotly, the body portion of each nprinnrlyingl against one of the opstandingr walls and being looped or otl'sctthrough a portion otA its` length, as shown at 2L 2Q, to extend througha suitable aperture within the wall and en gage tho font. Shoulders areprovided on the aide wall ot the tout the otl'aot portiom ot theSlnjitlltlti'hA are prtvltralily ingg; the side t'or engagement liySpringe, and these t'ormed hy indent.- watts ot' the tout, as* shown at23, ot` vfateli indentationc being); cn- 1raport by thc ahouldnrsl;tormod hy thc earrings, aa desrrilied, and the bottoms ot thoindontations laiun; engaged hy the lower editen ot the opi-ine lerahlyone ot the nnfintg'a, as ltl, ha:a `itsl trec end directed outwardly ortoward tho door Q5 ol thc lamp and extending' af; a tluunlrpiere tthrough a nuitahle aperture in the wall ttl. lhe 'tout is readilyinnerted and properly located upon its: :seat by tinstpreaaingg theSpring;l l!) hy pressure upon its tzliialiili-pitr e titi, and thentorcingr the l'ont inwardly until its side 1ndeutat-ions reclutar withand receive the oti`- set portirms ot' the Springs.

ln tho eonatruotion illustrated 'in Figs, 3 and At, in lieu ot the,leal' springs shown in ltiiga. t and L) tht-` dctent; talicis tho forniof an ectirentrit: piroatly mounted .in the casing and adapted toorigano ashoulder on the tout', thin eccentric being normally held init` iulvanood position hy a Spring. 'llie cc verdrie il? is carried hy aspindle 28 Stopped in the tloor or bottoni 13 ot thc lamp casing, andhaving,r ahearingr at itsaipper end in a block El!) scourtu'l to thoundcr face of the wall 18. t hclical spring 30 is Shown as attached at3], to -thc iside wall o3t` tho casing and at to thc eccentric at apoint oppo` sito its swell. The owoll'o'f thc eccentric projects throughan a pei-turc in the vertical wall 't6 of thc font seat and entersthe-apertura or recess in the sido wall of the font, as more plainlyshown in Fig. Ll. `As. the font is withdrawn thc eccentric will roll onthe wall. of tho roc-.cocl in tho side thereof, turningo,r its swcllhacl: ofthe wall through which it projects. t i

lft is; obvious that various changes can hc made, in thc :torni of thodotant and thc vnf rifarsdetails ot. construct-ion without dcparting''from thc scopo ot the invcntioil. Tho detcnt niay he applied to eitherone. or both sides ot thc linut, thc latter n'ialing with .its scat asutl'iciontly tight tit to prevent ita disptaccmcut toy jarrii hold atono sido only;

l'y means oti t" ni eonotruction shown ani-ft deScrlhcd tho -tout as:maui-olly hold to itt: beat against any tendtaicy, due to gars or vibraollsott in y,"

tion, displace it, and the bulnef 33v s thus pelmnnenty held at the axisof the lenses 11, 12.

claim as my invention-- l. in a lump, in combination, a body, e fontseaed n 'the body and havin on iis side Wall an upwardly facing Shoulce1' and e. peil' of vertical shouders, and a sp'ng attached to 'she bodyand bearing against tbe several named shoulders on the font.

'2. n a lamp, in combination, a body, a font seaed in the body andhaving its 51de Wadi indented o form an upwardly facing Sboude? and apair of vertical shoulders, a spring ataehed to thebody and bearingagainst the fone and having an offset por't'lon entering be indenaton inthe Walthereof.

3. En a, Emp, in combination, a body., a ona seaed in the body andhaving paralel side Walls with ndentatons therein, leaf springs attachedto the body and bearing latelally against the font, the springs beingbowed outward to enter the ndentatons.

4. In a lamp, in eombnzyton, a body, a font seated within the body,springs attached to one of the named elements and engaging vertical andhorzonaal Shouders on the other.

5. ln a lamp, n combination, a body hav ing a horizont-:l sde-Way, afont adapted to enter the Way and having a lateral de-l preseon, and asprung advanced detent.

mounted on the body and adapted to enter the depression. n

VVILLAM S. HAMM. Wnesses:

LOUIS K. GXLLSON, E. M. KLATCHER.

